Fréchette, Guillaume R. (2012), Session-Effects in the Laboratory, Experimental Economics, 15(3): 485-498. Erratum: On top of page 493, I attribute the first use of the turnpike design to Cooper et al (1996). It had been used earlier by McKelvey and Palfrey in their paper "An Experimental Study of the Centipede Game" published in 1992 (Econometrica, 60(4): 803-836).